Flash Flood Warning 135, NWS JSJ

Issued

Sep 13, 2011, 8:23 AM CDT (13:23 UTC)

Expired

Sep 13, 2011, 11:00 AM CDT

In force

3 hr

Issued by

NWS JSJ

Area

Storm-based polygon

Flood severity

None

The San Juan radar (TJUA), 22 km from the middle of the area, began a volume at 13:24 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

561 
WGCA52 TJSJ 131323
FFWSJU
PRC009-019-021-041-045-105-135-131600-
/O.NEW.TJSJ.FF.W.0135.110913T1323Z-110913T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
923 AM AST TUE SEP 13 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED AND EXPANDED 
THE

* FLASH FLOOD WARNING FOR THE DE LA PLATA RIVER IN...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     BAYAMON
     CIDRA
     COMERIO
     AIBONITO
     BARRANQUITAS
     NARANJITO
     TOA ALTA

* UNTIL NOON AST

* AT 905 AM AST...DOPPLER RADAR INDICATED INTERMITTENT SHOWERS AND 
THUNDERSTORMS WITH EMBEDDED HEAVY RAIN IN THE HEADWATERS OF THE RIO 
DE LA PLATA...ACROSS AIBONITO...COMERIO. RUNOFF FROM THIS RAINFALL 
IN ADDITION TO THE RAINFALL OVERNIGHT WILL CAUSE ADDITIONAL FLASH 
FLOODING IN THESE MUNICIPALITIES.

FOR THE RIO DE LA PLATA AT COMERIO...FLOOD STAGE IS 11 FEET. AT 905 
AM AST...THE USGS SENSORS INDICATED THE RIVERS HAD RISEN TO 16.98 
FEET AT COMERIO AND FLUCTUATING. MODERATE FLOODING IS FORECAST.

FOR THE RIO DE LA PLATA AT DE LA PLATA DAM - FLOOD STAGE IS 16 FEET. 
AT 905 AM AST...THE USGS SENSORS INDICATED THE RIVERS HAD RISEN TO 
18.61 FEET AND FLUCTUATING. MINOR FLOODING IS FORECAST.

FOR THE RIO DE LA PLATA AT TOA ALTA - MINOR FLOODING IS FORECAST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

IN MOUNTAINOUS OR HILLY TERRAIN...THERE ARE HUNDREDS OF LOW WATER
CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT
ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES
AWAY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 1826 6622 1835 6625 1835 6620 1826 6620
      1815 6622 1816 6631

$$

AAS

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN

Flash Flood Warnings in Puerto Rico, 2011Every flash flood warning in 2011

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.